Constructional toy



Feb. 23, 1943. E. ORLI'K GONSTBUCTIONAL TOY Filed Dec. 28, 1939 Patented Feba 23, 1943 2,311,907 CONSTRUCEIEQNAL TOY Emil (lrlik, Prague-Smichow, Czechoslovakia; vested in the Alien Property Custodian 1939, Serial No. 281,713 In Czechoslovaki Application June 28,

1 Claim.

This invention relates to units for constructional toys. According to the invention each unit consists of a hollow profile bar of paper or cardboard, which can be collapsed into a flat con dition along its edges.

Various embodiments of the invention are illustrated by way of example in the accompanying drawing, in which Figure l is a perspective view of one form of a paper or cardboard blank from which the unit according to the invention is made;

Figure 2 shows in perspective the unit in the form of a hollow profile bar;

Figure 3 is a perspective view of the same unit collapsed along its longitudinal edges in a fiat condition;

Figure 4 is a perspective view of the same unit in the form of a hollow bar as in Figure 2, but with the addition of means to prevent it from collapsing;

Figure 5 is a perspective view of a structure formed from hollow profile bars of the kind illustrated in the previous figures;

Figures 6, '7 and 8 each comprise a perspective view oi a unit imitating 9. rolled iron section formed from the original hollow profile bar in a manner diagrammatically indicated in each figure, the bar in Figure 6 being in the form of an angle iron, that in Figure '7 having a section in the form of a cross, and that in Figure B being a T-bar, shown in conjunction with another element.

The material employed formaking the unit will preferably be gummed paper or pasteboard. In the original strip material 9, folding grooves or creases It are formed by means of a roller in the manner indicated in Figure 1, the distance between the creases corresponding to the breadth of the walls of the individual unit to be produced. By dividing the strip 9 lengthwise by weakening lines it into narrower strips I I, i2, it, it and it, which remain attached to one another, the blanls may be folded into the form of the hollow profile bar shown in Figure 2. By sticking the strip element ii on to the outside of the strip element it, as shown in Figure 2, this element is made ready for use, but can still be collapsed along its edges iii into the fiat form illustrated in Figure 3.

Out of this unit a bar of any one of the forms shown at it, it and it in Figures 6, '7 and 8 may be formed in the manner diagrammatically ina May 17, 1939 dicated in dot-and-dash lines in these figures, by pressing the unit in at the point or points indicated by arrows, and securing it in this position with adhesive if desired. Thusthe angle bar it the sides of the original unit until they meet.

A built-up joist may be formed by securing the two opposite edges of a web it to two of these 'r-bars it as indicated for one edge in Figure 8.

To prevent accidental collapse of the hollow bar shown in Figure 2 it may be stifiened by sticking a paper strip 29 round the end, as indicated in Figure 4. In assembling these units to form a structure, apertures may be cut in some units 23 to enable other units 22 to penetrate into or through them, and the lugs 2! produced in forming these apertures may be bent back and stuck to the adjoining elements, as indicated in Figure 5.

It will be obvious that the shape of these elements admits oi considerable variation, as does also the method of securing them and. uniting them to one another.

What I claim is:

A unit for constructional @515 comprising, a sheet of relatively heavy paper having four grooves therein extending longitudinally oi the sheet, said grooves being equally spaced m; V

spect to each other to provide five strips of substantially equal widths, said strips being folded along said grooves with four of the strips providing a hollow bar of substantially square crosssection, the fifth strip covering a fiat face of a first of the four strips and adhesively joined in surface engagement therewith, central portions of the second and fourth strips adjacent the filth strip being folded longitudinally inward with in ner faces of the second and fourth strip lying along an inner face of the first strip, and a central portion of the third strip being folded in wardly with inner faces thereoi. in flat engagement with inner faces of the second and iourth strips.

romioarm. 

